Renewable Resources: Chapters 18 - Almost There Review
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Define the Following:
Renewable Energy - Energy from sources that are constantly being formed.
Active Solar Heating - Uses a heat exchanger
Hydroelectric Energy - electricity generated from moving water
Alternative Energy - Energy from sources that are still in development
Energy Efficiency - The percentage of energy put into a system that does useful work
Energy Conservation - To use less energy
Wind Power: How would you describe the current wind turbine technology? Cost-effective
What are some disadvantages of collecting and using wind energy? The difficulty of transporting the energy from its source to where it is needed.
Is this the fastest or slowest growing renewable energy source? Fastest
Wind turbines convert the movement of the wind into Electrical energy
Biomass Fuel: Using gasohol or ethanol from corn in vehicles is an example of using Biomass fuel.
In what ways do we use biomass fuel? Biogas digesters ferment manure and produce methane and Dung fired power station produce electricity. Motor vehicles using gasohol or ethanol made from corn.
What are the major sources of biomass fuel in developing countries? Wood and dung
What is biomass fuel primarily used for in developing countries? Heating and cooking
Hydroelectric Energy: Hydroelectric energy is electricity generated from Moving water
What are three disadvantages of hydroelectric energy? Habitat loss, soil erosion, reduced productivity of farmland
A tidal power plant works much like a Hydroelectric power plant.
Geothermal Energy: What geologic condition is required to run a geothermal power plant? In areas where deposits of water are heated inside the Earth.
How is geologic energy converted into electrical energy? Pumping heated water or steam from rock formations
How do geothermal heat pumps work? Circulating fluid underground to absorb heat from Earth
Renewable Energy: What are the four types of renewable energies found on the Earth? Wind, moving water, sunlight, and heat from Earth’s interior.
Energy from sources that are still in development is Alternative energy.
Ocean Thermal Energy Conversion (OTEC) works because water boils at low temperatures when under low pressure in a vacuum chamber.
What are some disadvantages of OTEC? Inefficient plants
Fuel Cell: What element is the most abundant in the universe? Hydrogen How does this relate to its use in fuel cells? Hydrogen can be burned as a fuel or used to produce electricity chemically.
Hydrogen gas can be produced by using Electricity to split molecules of water.
Electricity is produced chemically when hydrogen and oxygen are combined in a Fuel Cell
How can the United States conserve energy? Using public transportation, turning thermostats down in winter and up in the summer, and insulating homes and businesses.
What is the percentage of energy put into a system that does useful work? Energy efficiency
What are the most energy efficient vehicles produced today? Hybrid cars
What two sources of energy do hybrid cars use? An efficient gasoline engine and an electric motor.
Hybrid cars convert some of the energy from Braking into electricity.
Name a good example of cogeneration of energy: Using the waste heat from a furnace to power a steam turbine
Which uses less energy; washing clothes in cold water or washing clothes in warm water? Cold water
In the United States, how can we increase energy efficiency? Using public transportation and developing more effective engines for vehicles.
Tidal power, hydrogen fuel cells, and ocean thermal energy conversion are sources of Alternative energy.
When bacteria decompose organic wastes, one by-product is Methane, which can be burned to generate heat and electricity.
Wind, plant growth, and the water cycle are powered by The Sun.
Energy from sources that are constantly being formed is renewable energy.